target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.h

   1 /*
   2  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
   3  *
   4  * Copyright (C) 2002-2011 Aleph One Ltd.
   5  *   for Toby Churchill Ltd and Brightstar Engineering
   6  *
   7  * Created by Charles Manning <charles@aleph1.co.uk>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU Lesser General Public License version 2.1 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
  14  */
  15
  16 /* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
  17
  18 #ifndef __YAFFS_PACKEDTAGS1_H__
  19 #define __YAFFS_PACKEDTAGS1_H__
  20
  21 #include "yaffs_guts.h"
  22
  23 struct yaffs_packed_tags1 {
  24         u32 chunk_id:20;
  25         u32 serial_number:2;
  26         u32 n_bytes:10;
  27         u32 obj_id:18;
  28         u32 ecc:12;
  29         u32 deleted:1;
  30         u32 unused_stuff:1;
  31         unsigned should_be_ff;
  32
  33 };
  34
  35 void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
  36                       const struct yaffs_ext_tags *t);
  37 void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
  38                         const struct yaffs_packed_tags1 *pt);
  39 #endif